--- /dev/null
+XCOMM $TOG: X11.rules /main/4 1997/04/30 15:23:24 kaleb $
+
+/* Note whether we are the top level project. */
+#ifndef SeenTopLevelProject
+# define SeenTopLevelProject YES
+# define X11IsTopLevelProject YES
+#else
+# define X11IsTopLevelProject NO
+#endif
+
+/*
+ * If no clues are given assume X11 is in the tree, otherwise
+ * UseInstalled overrides UseImports. Do not do both.
+ */
+#ifndef UseInstalledX11
+# define UseInstalledX11 NO
+#endif
+#ifdef UseInstalled
+# undef UseInstalledX11
+# define UseInstalledX11 YES
+#endif
+
+#ifndef ImportX11
+# ifdef UseImports
+# define ImportX11 YES
+# else
+# define ImportX11 NO
+# endif
+#endif
+#if UseInstalledX11
+# undef ImportX11
+# define ImportX11 NO
+#endif
+
+#ifdef X11ProjectRoot
+# define XUsrLibDirPath $(USRLIBDIR):$(XPROJECTROOT)/lib
+#else
+# define XUsrLibDirPath $(USRLIBDIR)
+#endif
+#ifdef UsrLibDirPath
+# undef UsrLibDirPath
+#endif
+#define UsrLibDirPath XUsrLibDirPath
+
+#if ImportX11
+# define XLdPreLibs -L$(LIBSRC)
+#elif defined(UseInstalledX11) && defined(X11ProjectRoot)
+# define XLdPreLibs -L$(XPROJECTROOT)/lib
+#else
+# define XLdPreLibs /**/
+#endif
+#ifdef LdPreLibs
+# undef LdPreLibs
+#endif
+#define LdPreLibs LdPreLib XLdPreLibs
+
+#ifdef X11ProjectRoot
+# define XLdPostLibs -L$(XPROJECTROOT)/lib
+#else
+# define XLdPostLibs /**/
+#endif
+#ifdef LdPostLibs
+# undef LdPostLibs
+#endif
+#define LdPostLibs LdPostLib XLdPostLibs
+
+#if ImportX11
+# define TopXInclude -I$(TOP)/imports/x11/include
+#elif !UseInstalledX11
+# define TopXInclude -I$(TOP)/exports/include
+#else
+# define TopXInclude -I$(XPROJECTROOT)/include
+#endif
+#ifdef TopIncludes
+# undef TopIncludes
+#endif
+#define TopIncludes TopInclude $(TOP_X_INCLUDES)
+
+#if UseInstalledX11 && defined(X11ProjectRoot)
+# define X11BuildLibPath $(XPROJECTROOT)/lib
+#elif UseInstalledX11
+# define X11BuildLibPath $(USRLIBDIR)
+#elif ImportX11
+# define X11BuildLibPath $(XTOP)/lib
+#else
+# define X11BuildLibPath $(TOP)/exports/lib
+#endif
+#ifdef SystemBuildLibPath
+# define BuildLibPath $(XENVLIBDIR):$(SYSTEMENVLIBDIR)
+#else
+# define BuildLibPath $(XENVLIBDIR)
+#endif
+
+#ifndef X11ProjectDefines
+# define X11ProjectDefines /**/
+#endif
+#define ProjectDefines X11ProjectDefines
+
+#ifndef X11CplusplusProjectDefines
+# define X11CplusplusProjectDefines X11ProjectDefines
+#endif
+#define CplusplusProjectDefines X11CplusplusProjectDefines